XilVGA - Schematic

The schematic, like the one for XilMezzie, is done in Eagle PCB. You can download it here.

This is based on the XilMezzie schematic - although I've already made a new revision of the XilMezzie to use the Spartan 3A device, and also provide more I/O pins.

Page 1

This is I/O bank 0 and the clock (which actually goes to I/O bank 2). All the I/O pins go to the SRAM chip. None of the input pins are used.

Page 2

This is I/O bank 1, which has the top of the SRAM chip and also SPI interface. The input pin is not used.

Page 3

This is I/O bank 2 and configuration device. Most of the I/O pins are either used for configuration, or for providing a 9bpp RGB output.

Page 4

This is I/O bank 3, which is the bottom of the SRAM chip. Again, the input pins are not used.

Page 5

This is the FPGA power pins and JTAG interface.

Page 6

This is the 1.2V power supply - it is a lot simpler than the XilMezzie board in that it only needs one voltage regulator.

Page 7

This is the SRAM chip. I'm not actually using the Cypress CY7C1049; I'm using an IDT chip. However, the package and pinout are the same.

Page 8

THis is the VGA connector. The resistors are to make the digital signal an analogue signal (without requiring a DAC).